Add Leaderboard video-generation first-frame assets (batch 175/303)

.gitattributes

@@ -19521,3 +19521,72 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/MirrorFragmentReflect_Ballo
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Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_BalloonFloat_FixedPlanarRedirect__bg264__YDCwuf_trajectory/caption.txt

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+A blue-gray laser beam emanates from an apparatus atop a white box, impinging upon an elliptical mirror situated on an aluminum floor, and subsequently reflects linearly in accordance with the law of reflection. Concurrently, a silver bucket descends rapidly under the influence of gravity, with a second mirror positioned beneath it. Simultaneously, a brown balloon ascends vertically, sustained by a net upward buoyant force exceeding the gravitational force, consistent with Archimedes' principle.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_BalloonFloat_FixedPlanarRedirect__bg264__afssGU_trajectory/caption.txt

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+A copper laser emitter projects a collimated beam from the upper surface of a pink matte wooden enclosure onto an elliptical mirror. The incident light reflects linearly upon the purple highly reflective surface below. Concurrently, a copper bucket undergoes rapid vertical descent. Adjacent to this spatial configuration, a reflective blue-gray balloon ascends vertically. The net upward buoyant force exceeds the gravitational force, sustaining its vertical motion in accordance with Archimedes' principle.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_BalloonFloat_FixedPlanarRedirect__bg264__fHA4Bn_trajectory/caption.txt

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+A red weathered wooden laser pointer mounted on a red-orange wooden box projects a beam downward onto an elliptical mirror situated on the orange ground, reflecting linearly in accordance with the law of reflection. Concurrently, a blue embossed laundry basket descends rapidly under gravity, with a second mirror positioned on the surface. Nearby, a pale pink balloon ascends vertically; its motion is sustained by an upward net buoyant force exceeding its weight, consistent with Archimedes' principle.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_BalloonFloat_FixedPlanarRedirect__bg264__gDJKF7_trajectory/caption.txt

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+A laser beam propagates vertically downward. Upon incidence on an elliptical mirror, the beam reflects along a rectilinear path in accordance with the law of reflection. Simultaneously, a reflective bucket falls rapidly under the action of gravity. Nearby, a yellow balloon ascends vertically. Its motion is sustained by an upward net buoyant force exceeding gravitational force, consistent with Archimedes' principle.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_BalloonFloat_FixedPlanarRedirect__bg264__jwo2gs_trajectory/caption.txt

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+A moss-covered laser pointer projects a light beam downward, striking an elliptical mirror and reflecting along a straight line in accordance with the law of reflection. Concurrently, an aluminum bucket falls rapidly under the influence of gravity. Nearby, a pale blue balloon ascends vertically; its motion is sustained by a net upward buoyant force exceeding gravitational force, consistent with Archimedes' principle.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_ElasticCouple_MirrorReflect__bg247__2cJ6O7_trajectory/caption.txt

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+A white truck advances forward, its rear hook connected via a taut rope to a stationary yellow-green backpack positioned behind. During forward acceleration, the backpack's inertia resists motion, causing the rope to undergo elastic extension under tension. The elastic potential energy stored within the elongated rope subsequently transmits a force oriented backward; following a brief temporal delay, it pulls the backpack forward. An elliptical mirror reflects the entire sequence in real-time, capturing the white truck, rope, yellow-green backpack, and their relative motion with optical fidelity.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_ElasticCouple_MirrorReflect__bg247__5rBhLZ_trajectory/caption.txt

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+A blue truck advances, its rear hook connected to a gray matte backpack positioned behind via a taut rope. During acceleration, the backpack resists motion due to inertia, causing the rope to elastically elongate under tension. Stored elastic potential energy transmits force, pulling the backpack forward following a brief temporal delay. An oval mirror reflects the moving blue truck, rope, and backpack in real time, preserving their relative kinematics with optical fidelity. Throughout the process, mass remains constant; the rope maintains constraint under load, and the system evolves within the elastic limit.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_ElasticCouple_MirrorReflect__bg247__7SoE1M_trajectory/caption.txt

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+A yellow-green truck advances, with its rear hook connected via a taut rope to a rearward gray matte backpack. During vehicle acceleration, the rope undergoes elastic elongation due to tension generated by the backpack's inertial resistance to motion. Stored elastic potential energy transmits tensile force; following a brief delay, the backpack is drawn forward. An oval mirror reflects the sequence, capturing the synchronous motion of the truck, rope, and backpack with optical fidelity.

Leaderboard/Video Generation/TriplePhysics/MirrorFragmentReflect_ElasticCouple_MirrorReflect__bg247__CLKEng_trajectory/caption.txt

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+A ceramic truck traverses a flat, light-colored surface, its rear hook connected via a taut rope to a stationary green-yellow backpack positioned behind. During forward acceleration, the backpack exhibits inertial resistance, causing the rope to elongate elastically under tension. The elastic potential energy stored within the extended rope subsequently transmits a rearward-directed force; following a brief delay, it propels the backpack forward. An elliptical mirror situated on the ground at the system's rear reflects the process in real time, recording the ceramic truck, rope, backpack, and their relative motions with optical fidelity.